Well spaced paddle like knobs in the center and large siped corner power through any terrain. EXO equipped models feature Maxxis' EXO sidewall protection which help prevent puncture from sidewall abrasions. TR - Tubeless Ready - sealant required. TERRA - 3C Maxx Terra is softer and offers more traction than 3C Maxx Speed, yet provides better treadwear and less rolling resistance than Maxx Grip.